What term is defined as the ratio obtained by dividing the rope's breaking strength by the sum of the maximum load to be hoisted, the weight of the rope, and bending and acceleration stresses?

What term is defined as the ratio obtained by dividing the rope's breaking strength by the sum of the maximum load to be hoisted, the weight of the rope, and bending and acceleration stresses?

• A. Dynamic Load Factor
• B. Safety Factor
• C. Load Capacity Ratio
• D. Tensile Factor

Answer: (A)

Dynamic load factor is the measure used when you want to know how much the rope’s breaking strength exceeds the actual dynamic demands placed on it. In hoisting, the worst-case load isn’t just the weight of the payload; it also includes the rope’s own weight and additional stresses from bending around pulleys and从 acceleration or deceleration of the lift. By dividing the rope’s breaking strength by this total demand, you get a ratio that represents how many times stronger the rope is than the worst-case dynamic load it must carry. That focus on dynamic effects—bending and acceleration stresses—is what makes this term the best fit. A standard safety factor typically relates to static or nominal loads and doesn’t inherently isolate dynamic contributions in the same way.

Dynamic load factor is the measure used when you want to know how much the rope’s breaking strength exceeds the actual dynamic demands placed on it. In hoisting, the worst-case load isn’t just the weight of the payload; it also includes the rope’s own weight and additional stresses from bending around pulleys and从 acceleration or deceleration of the lift. By dividing the rope’s breaking strength by this total demand, you get a ratio that represents how many times stronger the rope is than the worst-case dynamic load it must carry. That focus on dynamic effects—bending and acceleration stresses—is what makes this term the best fit. A standard safety factor typically relates to static or nominal loads and doesn’t inherently isolate dynamic contributions in the same way.